Characterization of the effects of pressure and hydrogen concentration on laminar burning velocities of methane-hydrogen-air mixtures
30th International Symposium on Combustion, Abstracts of Symposium Papers, Chicago, IL, Amerika Birleşik Devletleri, 25 - 30 Temmuz 2004, ss.19, (Tam Metin Bildiri)
- Yayın Türü: Bildiri / Tam Metin Bildiri
- Basıldığı Şehir: Chicago, IL
- Basıldığı Ülke: Amerika Birleşik Devletleri
- Sayfa Sayıları: ss.19
- Orta Doğu Teknik Üniversitesi Adresli: Evet
Özet
A study was carried out to characterize both the effects of pressure and of hydrogen addition on CH4/air premixed laminar flames. The experimental set-up consisted of a spherical combustion chamber coupled to a classical shadowgraphy system. The results for atmospheric laminar CH4/air flames were compared to literature. Very good agreements were obtained both for laminar burning velocities and for burned gas Markstein length. Then, increasing the hydrogen content in the mixture was responsible for an increase of the laminar burning velocity and for a reduction of the flame dependence on stretch. Transport effects played a rote in reducing the sensitivity of the fundamental flame velocity to the stretch. When the pressure was increased, the laminar burning velocity decreased for all mixtures. The pressure domain was limited to 0.5 MPa due to the onset of instabilities at pressures above this value. This is an abstract of a paper presented at the 30th International Symposium on Combustion (Chicago, IL 7/25-30/2004).